257 resultados para soil use
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"August 1938."
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Cover title.
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Contribution from Soil Conservation Service.
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"The greater part of the material used was selected from the files of the Work Projects Administration Erosion history project, 701-2-240, Columbia, S.C."--Foot-note, p. 1.
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Cover title.
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Contribution from Soil Conservation Service.
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"August 1981."
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Bibliography: p. 29-30.
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Bibliography: p. 41-42.
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Bibliography: p. 41-44.
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"Agricultural Research Service ... in cooperation with Arizona and Texas Agricultural Experiment Stations."
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Contribution from Soil Conservation Service.
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Cover title.
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A study of soil erosion on the Honey Hollow creek watershed, Bucks County, Pennsylvania.